IN VIVO MEASUREMENT OF SOUND VELOCITY USING A HIGH RESOLUTION ULTRASONIC SCANNER.

T. Ogawa, K. Katakura, S. Umemura, N. Hayashi, N. Tamaki, K. Yamamoto, K. Torizuka, M. Kodama

Research output: Contribution to conferencePaper

1 Citation (Scopus)

Abstract

Sound velocity is one of the important parameters in testing stiffness of tissue. A few transmission-mode methods have been proposed but these aren't adequate for IN VIVO measurement. A reflection-mode method using mechanical scanners has also been proposed. A new electronic B-scanner that has the potential to test IN VIVO sound velocity in real time is described. The principle behind this method is to test sound velocity by solving two equations simultaneously, the first is the relation between distance to the reflecting target and two-way flight time, the second is the relation between distance to the target and time-of-flight curvature at the receiver. In testing of liver, cirrhotic, normal and fatty liver were successfully discriminated. A thin fat layer is expected to have negligible effect on accuracy and the beam profile.

Original languageEnglish
Number of pages1
Publication statusPublished - 1984 Dec 1

ASJC Scopus subject areas

  • Engineering(all)

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    Ogawa, T., Katakura, K., Umemura, S., Hayashi, N., Tamaki, N., Yamamoto, K., Torizuka, K., & Kodama, M. (1984). IN VIVO MEASUREMENT OF SOUND VELOCITY USING A HIGH RESOLUTION ULTRASONIC SCANNER..